Injector

 

(57) Abstract:

Usage: in medical devices, namely, devices for injection. The inventive injector includes a housing, which is a through groove and the groove. In the groove is located handle with U-shaped retainer. During this movement of the latch with handle is due to the presence of the collar and the ledge. Inside the housing are spring, plunger, piston rod head and the Belleville washer. On the housing is movably sleeve with the upper slot and the lower slots. The handle has a shank. Inside the capsule is placed a piston with needle seal with two sealing elements, one of which has a slight interference fit, and the second is the increased tension, but this tension in the initial actuation point is excluded. The fastening of the handle is due to the interaction of the protrusion on the handle and with the Belleville washer. Blocking is due to the overlap of the transverse groove on the housing movable sleeve. Simplification of the Assembly is due to the fact that the latch is attached to the handle, in its middle part, with the groove formed by the shoulder and ledge. 2 C. p. F.-ly. 8 Il.

The invention relates to medicine in the body of drugs yourself. A device for administration of drugs, comprising a housing, a removable capsule with a needle, a plunger with a spring-loaded inner rod, terminating in a head connected with the handle. A disadvantage of the known device is that after the descent there is no fixation of the handle relative to the body and it can be separated. There is no lock after cocking device, which can lead to inadvertent triggering of the injector. Difficult long-term storage of medication in the capsule due to insufficient air-tightness of the tube. Try fixing the handle on the housing after activation of the injector reflected in the patent, however, the design requires the protrusion of the inner rod in the cocked position relative to the cover, resulting in increased axial dimensions.

The purpose of the invention is to enhance reliability of operation due to fix the handle on the case from falling out after actuation of the injector, increase security, in part inadvertent operation of the injector, as well as the increasing tightness of the capsule.

The essence of the invention lies in the fact that from falling out of the handle holds the Belleville washer, against inadvertent operation of the extension handle and the capsule is mounted an elastic sealing element, which at the beginning of actuation off from work and does not affect the friction between the capsule and the cap.

The set of distinctive features:

in transverse cross-cutting the slots are cut groove, and a rod side head, equipped with a Belleville washer that is installed with the possibility of overlap of its cylindrical part of the groove, and the portion of the handle, which is installed in slots made with the lip and collar, to form between them a transverse groove in which its middle part has a U-shaped clamp that is located with the opportunity to interact with the specified washer;

in the injector introduced rotary sleeve disposed on the housing of the injector, and the sleeve has upper and lower opposite the slot, the bottom of which is made interoperable shank of the handle.

On the inside of the capsule is made annular groove, the plug in the upper part of the outside is made with a tapered annular ledge on which is placed an elastic sealing element with possibility of simultaneous interaction with the annular ledge on the cover and the annular groove capsules.

In Fig. 1 presents the injector is in the cocked status is. a view along arrow a in Fig. 1, when the handle is unlocked; Fig. 5 is a view along arrow B in Fig. 1, when the handle is locked, and Fig. 6 is a view along arrow B in Fig. 1, when the handle is unlocked; Fig. 7 - handle with latch; Fig. 8 is a view along arrow B of Fig. 7.

The actuator of the injector includes a housing 1. In the casing through the slot 2 and the groove 3. In the groove 2 is located in the handle 4 with a U-shaped retainer 5. During this movement of the latch 5 with the handle 4 is due to the presence of the collar 6 and the projection 7. Inside the housing 1 there is a spring 8, the pusher 9, the rod 10 with the cylinder 11 and the Belleville washer 12. On the housing is movable (rotating) is a sleeve 13 with the upper slot 14 and the lower slits 15. The handle 4 has a shank 16. The housing 1 is connected with a removable casing of the capsule 17. Inside the capsule is located the piston 18 with the needle, medicinal cavity 19, the plug 20 with o-ring seal 21, the conical annular ledge 22 in which is located a sealing elastic element 23.

The housing 17 has a recess 24 and the annular groove 25. With the end face of the body covered by a flap 26.

For the actuator Assembly required:

1. The latch 5 with the middle part is installed in the groove formed by the collar 6 and the projection 7. After CLASS="ptx2">

2. Inside the housing 1 is installed Belleville washer 12, spring 8, the plunger 9 and the rod 10, with the spring 8 pressing the washer, and the latter cylindrical portion overlaps the groove 3. Thus the elastic force (elastic aimed at the extension of the body) handle 4 is fixed in the housing 1 due to the fact that its projection 7 abuts against the washer.

To cock the injector must click on the end of the body 1 with my pre-pusher 9 to the solid surface. The pusher 9 will begin to sink in the housing 1, compressing the spring 8, and the rod 10 with its head 11, having a hole in Belleville washer 12 will move apart elastic elements of the latch 5 and using them is fixed.

After cocking the drive is connected to the housing 17 of the capsule. For injection, i.e., actuation of the actuator, the extension of the needle and flow through her medication, it is necessary to press the handle 4, the latter is buried in the casing 1, will start to move along the groove 2, the latch 5. As soon as elastic elements of the latch will be released from the neck of the head 11 will be triggered.

The pusher 9 under the action of the spring 8 will move the cover 20, which has two belt seal relative to the inner surface of the housing 17, when Etoile more tightness, than the seal, made on the door.

At the beginning of the movement of the stub 20 of the sealing element 23 will be in the groove 25, which will weaken its interference fit with the tapered surface of the stopper and, as a consequence, the slide with her.

Since the movement of the plugs sealing function will take the seal 21.

Thus the displacement force of the stub 20 will not affect its original sealing, with more elevated tightness, which will provide greater protection from violations sterilization drugs.

Under the action of a medicinal liquid column, moving the stub 20 moves the piston 18 with a needle through the membrane stub with ribs 26 is introduced into the patient's body, while the air from the cavity of the location of the needle is removed along the edges of the membrane. As soon as the piston 18 reaches the end position, with the notch 24 of the medicinal fluid begins to flow through the needle.

To ensure locking of the handle 4, i.e., create obstacles in its extension from the housing 1, serves as the rotary sleeve 13. When you overlap it the outlet groove 2 (see Fig. 3) the end of the handle 4 rests against the internal wall of the sleeve 13. For sndstat groove 2.

To exclude inadvertent rotation of the sleeve 13 on the housing 1 on the most recently executed two lower slots 15, in one of which includes a shank 16. Each of the slots 15 determines the position of the sleeve 13 on the housing 1. To drive the sleeve 13 from one position to another must be pressed against the housing 1, the shank 16. (56) USSR Author's certificate N 787035, class A 61 M 5/18, 1980.

U.S. patent N 2.704.543, class A 61 M 5/18, 1957.

1. INJECTOR, consisting of a body, a removable capsule with a needle and insert the plunger with the spring loaded inner rod, terminating in a head connected with the handle, one part of which is installed in the through slot of the housing, and the other placed on the body and shank, characterized in that, to improve reliability, at the expense of fixing the handle on the case from falling out after actuation of the injector, in transverse cross-cutting the slots are cut groove, and a rod side head provided with a Belleville washer that is installed with the possibility of overlap of its cylindrical part of the groove, and that part of the handle that is installed in slots made with the lip and collar, to form between them a transverse groove in which its middle part has a U-shaped Fisica fact, that, to improve safety, in part inadvertent operation of the injector it introduced rotary sleeve disposed on the housing of the injector, and the sleeve has upper and lower opposite the slot, the bottom of which is arranged to interact with the shank of the handle.

3. Injector under item 1, characterized in that, to increase the tightness, in the wall of the capsule in its upper part on the inner side is made annular groove, the plug in the upper part of the outside is made with a tapered annular ledge on which is placed an elastic sealing element with possibility of simultaneous interaction with the annular ledge on the cover and ring grooves capsules.

 

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